Changes to Create securities transfer

added subschema #1: User unique identifier. to the user_id request property allOf list

the user_id request property type changed from string to no type, and format from uuid to no format

the response property user_id became optional for the status 200

the user_id response's property type changed from string to no type, and format from uuid to no format for status 200

added the new optional request property business_id

the request property settlement_reference became optional

the request property user_id became optional

added the optional property business_id to the response with the 200 status

added subschema #1: User unique identifier. to the user_id response property allOf list for the response status 200